Rev. 5
107
Remote Interface Reference
SCPI Status System
4.2.2.2
Reading the Status Byte using *STB?
The
*STB?
returns the contents of the Status Byte register, but it is processed
in the command queue like any other command. The
*STB?
command does
not clear bit 6 of the Status Byte register.
4.2.2.3
Using the Message Available Bit(s)
The “Message Available” bits (bits 3 or 4) of the Status Byte register can be
used to determine when data is available to read into your host computer. The
Model 430 Programmer clears the “Message Available” bits only after all
data has been read from the output buffer(s).
The “Message Available” bits of the Status Byte register are useful for
determining if queries have executed; however, they are not useful alone for
determining if commands have completed execution, since commands do not
provide return data.
4.2.3
Standard Event Register
The Standard Event register group reports a power-on condition, various
error conditions, and indicates when an operation has completed. Any or
all of the Standard Events can be reported to the Status Byte register by
enabling the corresponding bit(s) in the Standard Event enable register
(see Figure 4-1). To set the Standard Event enable register, write a binary-
weighted decimal value using the
*ESE <
value
>
command.
The bit definitions for the Standard Event register are provided in Table 4-
2. To query the Model 430 Programmer for the details of a reported error
in the Standard Event register, use the
SYSTem:ERRor?
query. See
section 4.6 for a complete discussion of the error buffer and messages.
The Standard Event
register
is cleared when:
•
The
*CLS
(clear status) command is executed.
•
The Standard Event register is queried using the
*ESR?
command.
The Standard Event
enable register
is cleared when:
•
The
*ESE 0
command is executed.
•
The power is turned off and then back on, and the Model 430
Programmer was configured for
*PSC 1
(power-on status clear). The
Summary of Contents for 05100PS-430-601
Page 2: ......
Page 10: ...x Rev 5 List of Figures ...
Page 12: ...xii Rev 5 List of Tables ...
Page 18: ...xviii Rev 5 Foreword Safety Summary ...
Page 30: ...12 Rev 5 Introduction Operating Characteristics ...
Page 42: ...24 Rev 3 Installation Power Up Procedure ...
Page 114: ...96 Rev 5 Operation Summary of Operational Limits ...
Page 156: ...138 Rev 5 Remote Interface Reference Error Messages ...
Page 168: ...150 Rev 5 Service Return Authorization ...
Page 226: ...208 Rev 5 Index ...
